Samsung Front loader will not go in to high speed spin it starts to get faster maybe 100 rpm. Then just goes back to wash rpm then it will try again no error code is displayed. I put washer in service mode and it will go high speed 1000 rpm or more. Just will not under regular modes. Pressure switch check good Hose is not block. Washer pumps out all the water. The hall sensor had 4.9 volts orange and pink wires; but on the pair orange and red that show as 0 to 3.75 volts only get 0 to1.2 volts as you turn drum.
Do I need to replace main control board? Larry
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